I have a FR rack and made my own bracket from 1 inch angle grounded to the body with its own wire to a OEM ground point. Works well and not expensive. I have a few things from FR that I bought thinking they would be welcome additions but I have yet to use them. FR makes great stuff, don't get me wrong but I think many add-ons are not for me. I now have a Tactical 4X bumper with swing away tire carrier so the rack mounted tire carrier from FR sits in the box in the garage. Also got petrol can carrier from Baja that holds the cans on their sides very high so I fabricated a mount that holds them flat, that Baja can holder also sits in the garage. I also made a propane holder that is horizontal rather than vertical to keep it from getting bashed by too many limbs, still it gets whacked occasionally.
The FR antenna mount looks to be a great addition as it rotates to keep the antenna low for going into a garage.
The FR full length rack is the perfect length to hold my OZ tent.
The CUB boxes work well in the drawer system and the rack would be better if the braces for gear were run long ways versus short way. They make too much noise as the wind passes over the rack. I made a fairing for my rack and have discovered that they now have made one very much like mine only using different mounting, but the same shape and size.
My antenna does 'fold' to keep it low profile for trail use but I find that even in the horizontal position it sends and receives very well, as good as totally vertical. Really surprised me.
Many things are trial and experiment with me and I find that taking a piece of gear out for a spin is the best determination of how well it works for me. Some things pass the trip test, some don't.
I have seen a few antenna mounts (magnetic and bolted) that attach to the fender (Jeeps) or the bonnet but my hood is aluminum. Also do not want to watch the antenna waving in front of me as I travel on a trail.